but i think he's going to be more aggressive about challenging what romney is saying. again, i think biden did it to a point where every other word of ryan's he was inter -- trying to intercept. i think that the main thing is, the big lament from the obama team is they felt they let romney back in. i think the president comes in, more aggressive, energetic, more fight. that's what we expect to see. this idea that you don't know who these guys are, they keep changing their positions, there's no truth there, that's the big argument. >> thanks so much, chris cizilla. we'll see you on "meet the press." >> thank you. >> and coming up, we'll check in with the campaigns, jim talon and debbie wasserman-schultz and ben affleck brings you the iran rescue you've nef seen niver se. this is "andrea mitchell reports." x. just picking up some, brochures, posters copies of my acceptance speech. great! it's always good to have a backup plan, in case i get hit by a meteor. wow, your hair looks great.